It’s important to add up all of this time and factor it into your compensation, so you can get an accurate picture of how much money you are trading for your time. Remember that money in infinite, but time is finite. You can always go out and make some extra money, but you’ll never get back you time. How much are you willing to trade your life for?
Another way to generate passive income is to invest and be a silent partner in a business. This is very risky, but with risk comes the potential for high returns. For example, several years ago both Lyft and Uber were looking for private investors to invest in their companies. Today, they are worth billions - but you as an investor would only reap that benefit if they go public via an IPO, or get acquired. So, it's risky.